Water-rock interactions during recharge of effluents into a calcareous sandstone aquifer

O. Goren*, B. Lazar, A. Burg, I. Gavrieli

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The water-rock interactions following an artificial recharge of effluents into a calcareous sandstone aquifer were studied in the Soil Aquifer Treatment (SAT) system of the Shafdan sewage reclamation plant, Israel, and in laboratory column experiments. The Shafdan SATsystem is based on rapid infiltration of secondary effluents into the Israeli Coastal Aquifer and their recovery, for reuse in irrigation, after a residence time of a few months within the aquifer. Aset of laboratory column experiments was designed to simulate the geochemical evolution of the effluents during their flow in the aquifer. Both, experimental and field observations indicate that the main water-rock interactions altering the chemical composition of cations in the effluents are cation exchange and CaCO 3 dissolution. The initial cation exchange includes massive adsorption of Na+, K+ and Mg 2+ and desorption of Ca 2+. CaCO 3 dissolution caused constant increase of the Ca 2+ concentrations in the groundwater by 1-2 meq L-1.

Original languageEnglish
Title of host publicationWater-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
Pages249-252
Number of pages4
StatePublished - 2010
Event13th International Conference on Water-Rock Interaction, WRI-13 - Guanajuato, Mexico
Duration: 16 Aug 201020 Aug 2010

Publication series

NameWater-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13

Conference

Conference13th International Conference on Water-Rock Interaction, WRI-13
Country/TerritoryMexico
CityGuanajuato
Period16/08/1020/08/10

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